./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/zero_sum_m4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/zero_sum_m4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:45:25,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:45:25,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:45:25,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:45:25,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:45:25,810 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:45:25,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:45:25,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:45:25,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:45:25,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:45:25,820 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:45:25,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:45:25,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:45:25,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:45:25,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:45:25,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:45:25,834 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:45:25,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:45:25,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:45:25,855 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:45:25,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:45:25,865 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:45:25,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:45:25,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:45:25,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:45:25,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:45:25,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:45:25,874 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:45:25,874 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:45:25,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:45:25,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:45:25,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:45:25,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:45:25,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:45:25,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:45:25,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:45:25,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:45:25,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:45:25,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:45:25,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:45:25,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:45:25,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:45:25,954 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:45:25,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:45:25,955 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:45:25,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:45:25,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:45:25,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:45:25,958 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:45:25,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:45:25,959 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:45:25,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:45:25,961 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:45:25,961 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:45:25,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:45:25,962 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:45:25,962 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:45:25,962 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:45:25,962 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:45:25,963 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:45:25,963 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:45:25,963 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:45:25,963 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:45:25,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:45:25,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:45:25,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:45:25,964 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:25,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:45:25,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:45:25,967 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:45:25,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:45:25,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:45:25,968 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:45:25,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:45:25,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:45:25,969 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b7320b0b08ab747958954e3beeb769f7a9cf6ae7994b9d20ef1bd1e033aa0a7 [2022-11-16 11:45:26,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:45:26,365 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:45:26,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:45:26,372 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:45:26,373 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:45:26,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-crafted/zero_sum_m4.c [2022-11-16 11:45:26,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/data/9ca95b365/09dbc97f73584d929183d67d955049e8/FLAG1ceb26d13 [2022-11-16 11:45:27,085 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:45:27,091 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/sv-benchmarks/c/array-crafted/zero_sum_m4.c [2022-11-16 11:45:27,100 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/data/9ca95b365/09dbc97f73584d929183d67d955049e8/FLAG1ceb26d13 [2022-11-16 11:45:27,418 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/data/9ca95b365/09dbc97f73584d929183d67d955049e8 [2022-11-16 11:45:27,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:45:27,424 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:45:27,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:27,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:45:27,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:45:27,435 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe7905d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27, skipping insertion in model container [2022-11-16 11:45:27,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:45:27,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:45:27,746 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2022-11-16 11:45:27,789 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:27,808 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:45:27,824 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/sv-benchmarks/c/array-crafted/zero_sum_m4.c[402,415] [2022-11-16 11:45:27,837 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:45:27,860 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:45:27,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27 WrapperNode [2022-11-16 11:45:27,861 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:45:27,862 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:27,863 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:45:27,863 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:45:27,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,927 INFO L138 Inliner]: procedures = 15, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 127 [2022-11-16 11:45:27,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:45:27,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:45:27,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:45:27,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:45:27,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,984 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:27,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:45:27,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:45:27,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:45:27,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:45:27,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (1/1) ... [2022-11-16 11:45:28,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:45:28,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:28,039 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:45:28,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:45:28,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:45:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:45:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:45:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:45:28,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:45:28,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:45:28,097 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 11:45:28,097 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:45:28,227 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:45:28,229 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:45:28,481 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:45:28,489 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:45:28,490 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-16 11:45:28,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:28 BoogieIcfgContainer [2022-11-16 11:45:28,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:45:28,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:45:28,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:45:28,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:45:28,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:45:27" (1/3) ... [2022-11-16 11:45:28,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7ff904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:28, skipping insertion in model container [2022-11-16 11:45:28,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:45:27" (2/3) ... [2022-11-16 11:45:28,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7ff904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:45:28, skipping insertion in model container [2022-11-16 11:45:28,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:45:28" (3/3) ... [2022-11-16 11:45:28,525 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum_m4.c [2022-11-16 11:45:28,563 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:45:28,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 11:45:28,693 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:45:28,703 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@383841ed, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:45:28,703 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 11:45:28,716 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:28,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:45:28,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:28,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:28,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:28,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:28,737 INFO L85 PathProgramCache]: Analyzing trace with hash -2094998668, now seen corresponding path program 1 times [2022-11-16 11:45:28,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:28,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601761145] [2022-11-16 11:45:28,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:28,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:29,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:29,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:29,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601761145] [2022-11-16 11:45:29,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601761145] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:29,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:29,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:45:29,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523621594] [2022-11-16 11:45:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 11:45:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 11:45:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:45:29,143 INFO L87 Difference]: Start difference. First operand has 38 states, 36 states have (on average 1.5833333333333333) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:29,183 INFO L93 Difference]: Finished difference Result 71 states and 106 transitions. [2022-11-16 11:45:29,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 11:45:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 11:45:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:29,199 INFO L225 Difference]: With dead ends: 71 [2022-11-16 11:45:29,199 INFO L226 Difference]: Without dead ends: 33 [2022-11-16 11:45:29,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 11:45:29,218 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:29,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:45:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-16 11:45:29,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-16 11:45:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.28125) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-11-16 11:45:29,292 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 23 [2022-11-16 11:45:29,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:29,293 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-11-16 11:45:29,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 11.5) internal successors, (23), 2 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-11-16 11:45:29,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:45:29,297 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:29,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:45:29,299 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1680934388, now seen corresponding path program 1 times [2022-11-16 11:45:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:29,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825700194] [2022-11-16 11:45:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:29,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:29,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825700194] [2022-11-16 11:45:29,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825700194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:29,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:29,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:45:29,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401024902] [2022-11-16 11:45:29,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:29,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:45:29,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:29,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:45:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:45:29,525 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:29,620 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2022-11-16 11:45:29,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:45:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 11:45:29,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:29,622 INFO L225 Difference]: With dead ends: 63 [2022-11-16 11:45:29,622 INFO L226 Difference]: Without dead ends: 35 [2022-11-16 11:45:29,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:45:29,625 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:29,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:45:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-16 11:45:29,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-11-16 11:45:29,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-16 11:45:29,634 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 23 [2022-11-16 11:45:29,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:29,634 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-16 11:45:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:29,643 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-16 11:45:29,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:45:29,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:29,645 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:29,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:45:29,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:29,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1381660206, now seen corresponding path program 1 times [2022-11-16 11:45:29,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255038400] [2022-11-16 11:45:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:29,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:45:29,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:29,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255038400] [2022-11-16 11:45:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255038400] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:45:29,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:45:29,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:45:29,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707502271] [2022-11-16 11:45:29,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:45:29,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:45:29,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:45:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:45:29,907 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:30,059 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2022-11-16 11:45:30,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:45:30,060 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 11:45:30,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:30,062 INFO L225 Difference]: With dead ends: 75 [2022-11-16 11:45:30,062 INFO L226 Difference]: Without dead ends: 50 [2022-11-16 11:45:30,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:45:30,064 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 59 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:30,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 19 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:45:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-16 11:45:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-11-16 11:45:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2022-11-16 11:45:30,076 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 25 [2022-11-16 11:45:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:30,076 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2022-11-16 11:45:30,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2022-11-16 11:45:30,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:45:30,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:30,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:45:30,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash -158323138, now seen corresponding path program 1 times [2022-11-16 11:45:30,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:30,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792603386] [2022-11-16 11:45:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:30,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:45:30,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:30,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792603386] [2022-11-16 11:45:30,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792603386] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:30,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218540806] [2022-11-16 11:45:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:30,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:30,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:30,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:30,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:45:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:45:30,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:45:30,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:45:30,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218540806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:30,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:30,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-16 11:45:30,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467825357] [2022-11-16 11:45:30,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:30,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:45:30,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:45:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:45:30,663 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:30,770 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2022-11-16 11:45:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:45:30,771 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 11:45:30,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:30,772 INFO L225 Difference]: With dead ends: 81 [2022-11-16 11:45:30,772 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 11:45:30,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:45:30,775 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:30,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:45:30,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 11:45:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-11-16 11:45:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-11-16 11:45:30,794 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 41 [2022-11-16 11:45:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:30,795 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-11-16 11:45:30,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 7 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-11-16 11:45:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:45:30,798 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:30,798 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:30,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:31,006 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:31,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:31,006 INFO L85 PathProgramCache]: Analyzing trace with hash 408266208, now seen corresponding path program 2 times [2022-11-16 11:45:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:31,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523404358] [2022-11-16 11:45:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:31,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:45:31,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:31,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523404358] [2022-11-16 11:45:31,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523404358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:31,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449280413] [2022-11-16 11:45:31,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:45:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:31,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:31,202 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:45:31,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:45:31,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:31,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:45:31,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:45:31,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-16 11:45:31,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449280413] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:45:31,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:45:31,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-16 11:45:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664854210] [2022-11-16 11:45:31,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:31,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:45:31,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:45:31,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:45:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:45:31,654 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:31,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:45:31,913 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-11-16 11:45:31,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:45:31,914 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-11-16 11:45:31,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:45:31,921 INFO L225 Difference]: With dead ends: 100 [2022-11-16 11:45:31,921 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 11:45:31,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:45:31,926 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:45:31,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 27 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:45:31,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 11:45:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-11-16 11:45:31,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2022-11-16 11:45:31,951 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 43 [2022-11-16 11:45:31,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:45:31,951 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2022-11-16 11:45:31,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:45:31,952 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2022-11-16 11:45:31,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-16 11:45:31,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:45:31,954 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:45:31,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:45:32,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:32,162 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:45:32,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:45:32,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1004340752, now seen corresponding path program 3 times [2022-11-16 11:45:32,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:45:32,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196019256] [2022-11-16 11:45:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:32,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:45:32,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:39,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:45:39,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196019256] [2022-11-16 11:45:39,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196019256] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:39,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927817208] [2022-11-16 11:45:39,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:45:39,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:45:39,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:45:40,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:45:40,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:45:40,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 11:45:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:45:40,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-16 11:45:40,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:51,956 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:45:51,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2022-11-16 11:45:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:45:52,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:46:32,364 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:46:32,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 76 [2022-11-16 11:46:33,061 INFO L321 Elim1Store]: treesize reduction 58, result has 13.4 percent of original size [2022-11-16 11:46:33,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 17 [2022-11-16 11:46:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:46:34,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927817208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:46:34,505 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:46:34,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 47, 46] total 122 [2022-11-16 11:46:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353914666] [2022-11-16 11:46:34,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:46:34,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-11-16 11:46:34,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:46:34,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-11-16 11:46:34,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=13974, Unknown=0, NotChecked=0, Total=14762 [2022-11-16 11:46:34,515 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 122 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 122 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:21,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:21,412 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2022-11-16 11:47:21,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-16 11:47:21,413 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 122 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2022-11-16 11:47:21,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:21,416 INFO L225 Difference]: With dead ends: 162 [2022-11-16 11:47:21,416 INFO L226 Difference]: Without dead ends: 156 [2022-11-16 11:47:21,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 31 SyntacticMatches, 22 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9439 ImplicationChecksByTransitivity, 96.2s TimeCoverageRelationStatistics Valid=1416, Invalid=30083, Unknown=7, NotChecked=0, Total=31506 [2022-11-16 11:47:21,430 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 1855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1287 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:21,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 229 Invalid, 1855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 549 Invalid, 0 Unknown, 1287 Unchecked, 0.6s Time] [2022-11-16 11:47:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-16 11:47:21,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 101. [2022-11-16 11:47:21,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.16) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:21,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 116 transitions. [2022-11-16 11:47:21,465 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 116 transitions. Word has length 59 [2022-11-16 11:47:21,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:21,466 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 116 transitions. [2022-11-16 11:47:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.3852459016393444) internal successors, (169), 122 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:21,466 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 116 transitions. [2022-11-16 11:47:21,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:47:21,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:21,468 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:21,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:21,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:21,675 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1580077422, now seen corresponding path program 4 times [2022-11-16 11:47:21,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:21,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048460213] [2022-11-16 11:47:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:47:21,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:21,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048460213] [2022-11-16 11:47:21,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048460213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46988309] [2022-11-16 11:47:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 11:47:21,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:21,879 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:21,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:47:21,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 11:47:21,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:47:21,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:22,157 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:47:22,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:47:22,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46988309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:22,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:22,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-11-16 11:47:22,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633185622] [2022-11-16 11:47:22,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:22,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:47:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:22,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:47:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-11-16 11:47:22,294 INFO L87 Difference]: Start difference. First operand 101 states and 116 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:22,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:22,702 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2022-11-16 11:47:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:47:22,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-11-16 11:47:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:22,704 INFO L225 Difference]: With dead ends: 200 [2022-11-16 11:47:22,704 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 11:47:22,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:47:22,705 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:22,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 89 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:47:22,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 11:47:22,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-11-16 11:47:22,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1568627450980393) internal successors, (118), 102 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:22,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-11-16 11:47:22,735 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 61 [2022-11-16 11:47:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:22,736 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-11-16 11:47:22,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-11-16 11:47:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-16 11:47:22,737 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:22,738 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:22,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 11:47:22,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:22,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:22,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:22,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1107378484, now seen corresponding path program 5 times [2022-11-16 11:47:22,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:22,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148838280] [2022-11-16 11:47:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:23,111 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:47:23,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:23,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148838280] [2022-11-16 11:47:23,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148838280] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:23,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860034490] [2022-11-16 11:47:23,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 11:47:23,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:23,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:23,114 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:23,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:47:23,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-16 11:47:23,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:23,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 11:47:23,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:47:23,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-16 11:47:23,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860034490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:23,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:47:23,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-11-16 11:47:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54283098] [2022-11-16 11:47:23,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-16 11:47:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:47:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-16 11:47:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-11-16 11:47:23,533 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:24,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:24,062 INFO L93 Difference]: Finished difference Result 167 states and 195 transitions. [2022-11-16 11:47:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:47:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-11-16 11:47:24,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:24,063 INFO L225 Difference]: With dead ends: 167 [2022-11-16 11:47:24,063 INFO L226 Difference]: Without dead ends: 86 [2022-11-16 11:47:24,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2022-11-16 11:47:24,065 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 293 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:24,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 61 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:47:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-16 11:47:24,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2022-11-16 11:47:24,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2022-11-16 11:47:24,081 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 63 [2022-11-16 11:47:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:24,087 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2022-11-16 11:47:24,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:47:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2022-11-16 11:47:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-11-16 11:47:24,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:24,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:24,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:24,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:24,299 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:47:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1152417058, now seen corresponding path program 6 times [2022-11-16 11:47:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:47:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026566041] [2022-11-16 11:47:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:47:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:34,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:47:34,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026566041] [2022-11-16 11:47:34,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026566041] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:34,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042110093] [2022-11-16 11:47:34,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 11:47:34,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:47:34,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:47:34,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:47:34,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:47:34,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-11-16 11:47:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:47:34,845 WARN L261 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-16 11:47:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:47:47,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:05,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:53:05,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 58 treesize of output 148 [2022-11-16 11:53:06,663 INFO L321 Elim1Store]: treesize reduction 124, result has 9.5 percent of original size [2022-11-16 11:53:06,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 57 treesize of output 23 [2022-11-16 11:53:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:53:08,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042110093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:53:08,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:53:08,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 59, 59] total 166 [2022-11-16 11:53:08,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994500345] [2022-11-16 11:53:08,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:08,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-11-16 11:53:08,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:53:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-11-16 11:53:08,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=25850, Unknown=80, NotChecked=0, Total=27390 [2022-11-16 11:53:08,415 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 166 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 166 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:18,695 INFO L93 Difference]: Finished difference Result 202 states and 226 transitions. [2022-11-16 11:56:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-11-16 11:56:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 166 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2022-11-16 11:56:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:18,697 INFO L225 Difference]: With dead ends: 202 [2022-11-16 11:56:18,698 INFO L226 Difference]: Without dead ends: 198 [2022-11-16 11:56:18,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17138 ImplicationChecksByTransitivity, 520.8s TimeCoverageRelationStatistics Valid=2536, Invalid=50947, Unknown=109, NotChecked=0, Total=53592 [2022-11-16 11:56:18,705 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 81 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 5467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2862 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:18,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 361 Invalid, 5467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2396 Invalid, 0 Unknown, 2862 Unchecked, 2.9s Time] [2022-11-16 11:56:18,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-11-16 11:56:18,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 143. [2022-11-16 11:56:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 142 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:18,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2022-11-16 11:56:18,742 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 77 [2022-11-16 11:56:18,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:18,743 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2022-11-16 11:56:18,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.2771084337349397) internal successors, (212), 166 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:18,744 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2022-11-16 11:56:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-16 11:56:18,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:18,745 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:18,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:18,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:18,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:18,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash -214262460, now seen corresponding path program 7 times [2022-11-16 11:56:18,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:18,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054040385] [2022-11-16 11:56:18,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:19,187 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 11:56:19,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:19,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054040385] [2022-11-16 11:56:19,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054040385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:19,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736890999] [2022-11-16 11:56:19,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 11:56:19,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:19,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:19,189 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:19,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:56:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:56:19,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:19,529 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 11:56:19,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-11-16 11:56:19,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736890999] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:19,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:19,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 11:56:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070227860] [2022-11-16 11:56:19,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:56:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:56:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:56:19,715 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:20,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:20,340 INFO L93 Difference]: Finished difference Result 317 states and 356 transitions. [2022-11-16 11:56:20,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:56:20,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2022-11-16 11:56:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:20,342 INFO L225 Difference]: With dead ends: 317 [2022-11-16 11:56:20,342 INFO L226 Difference]: Without dead ends: 136 [2022-11-16 11:56:20,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=344, Unknown=0, NotChecked=0, Total=462 [2022-11-16 11:56:20,344 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:20,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 102 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:56:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-16 11:56:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-11-16 11:56:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.126865671641791) internal successors, (151), 134 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2022-11-16 11:56:20,380 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 79 [2022-11-16 11:56:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:20,380 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2022-11-16 11:56:20,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2022-11-16 11:56:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-16 11:56:20,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:20,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:20,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:20,589 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:20,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1053510502, now seen corresponding path program 8 times [2022-11-16 11:56:20,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:20,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623138180] [2022-11-16 11:56:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:20,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:20,838 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:56:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623138180] [2022-11-16 11:56:20,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623138180] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:20,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272718568] [2022-11-16 11:56:20,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:56:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:20,840 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:20,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:56:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 11:56:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:20,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:56:20,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:56:21,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:56:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:56:21,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272718568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:56:21,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 11:56:21,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-11-16 11:56:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694181543] [2022-11-16 11:56:21,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 11:56:21,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 11:56:21,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:56:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 11:56:21,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:56:21,230 INFO L87 Difference]: Start difference. First operand 135 states and 151 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:21,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:56:21,639 INFO L93 Difference]: Finished difference Result 211 states and 240 transitions. [2022-11-16 11:56:21,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 11:56:21,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-11-16 11:56:21,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:56:21,640 INFO L225 Difference]: With dead ends: 211 [2022-11-16 11:56:21,641 INFO L226 Difference]: Without dead ends: 104 [2022-11-16 11:56:21,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:56:21,642 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 303 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:56:21,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 36 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 11:56:21,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-16 11:56:21,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2022-11-16 11:56:21,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:21,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-11-16 11:56:21,656 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 81 [2022-11-16 11:56:21,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:56:21,656 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-11-16 11:56:21,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:56:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-11-16 11:56:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-16 11:56:21,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:56:21,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:56:21,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:56:21,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:21,865 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:56:21,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:56:21,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1202071596, now seen corresponding path program 9 times [2022-11-16 11:56:21,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:56:21,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932620129] [2022-11-16 11:56:21,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:56:21,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:56:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:56:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:56:43,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:56:43,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932620129] [2022-11-16 11:56:43,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932620129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:56:43,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607313154] [2022-11-16 11:56:43,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 11:56:43,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:56:43,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:56:43,599 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:56:43,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2e9920b-4f8c-4b4b-ad7c-5a5aa2c328d1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 11:56:43,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-16 11:56:43,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:56:43,746 WARN L261 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 153 conjunts are in the unsatisfiable core [2022-11-16 11:56:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:56:43,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-16 11:57:29,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:57:29,630 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:57:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 47 [2022-11-16 11:57:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 7 proven. 128 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:57:30,903 INFO L328 TraceCheckSpWp]: Computing backward predicates...